Air Curtains do their job quietly and efficiently… evenly distributing a laminar air flow over entryways such as customer entrance doors in retail stores, walk-in coolers / freezers or restaurants drive-up service windows when continually in use or left open for extended periods. Ideal for office environments that must co-exist with adjoining factories. Adjustable velocity settings make it easy to repel windborne contaminates such as dust, fumes and pollutants under varying mild wind conditions. While acting as a protective shield, air curtains save energy by reducing air conditioning and heating system usage.